EFFECT OF ULTRAVIOLET LIGHT AND THIOL COMPOUNDS ON GUINEA PIG SKIN HISTIDASE

[摘要] UV [ultraviolet] irradiation of guinea pig skin in vivo produces an increase in epidermal histidase activity. Irradiation in vitro does not. Independent of UV irradiation effect, GSH [reduced glutathione] and several other thiols increased the rate of enzyme activity. L-cysteine decreases the activity. An optimum GSH concen tration is shown above which the activity is decreased.